Exhibit 10.1 SUPPLEMENTAL EMPLOYMENT AGREEMENT July 19, 2002 Mr. Garrett E. Pierce 3792 Coventry Lane Boca Raton, Florida 33431 Dear Garrett: This letter agreement (the "Agreement') sets forth certain compensation terms described below that Orbital...Supplemental Employment Agreement • July 29th, 2002 • Orbital Sciences Corp /De/ • Search, detection, navagation, guidance, aeronautical sys • Virginia
